On Tue, 2003-01-28 at 14:48, Mike Uhler wrote: > If the patch assumes that one can look backward by one instruction > in the STATIC code to determine if the instruction is in a > delay slot, one can not have code that jumps directly to the > instruction following another branch, as this would cause the > code to assume that it was in the delay slot of the branch. A while back, when working on a different architecture that also had branch delay slots, it took me a while to get my head around the branch-in-a-delay-slot case, e.g. 10: b 100 20: b 30 30: foo ... 100: bar where the actual program flow would be 10 20 100 30 and instruction 100 would be considered to be in the delay slot of 20. I was *very* happy when I first looked at MIPS to see that this was specified as unpredictable, even if it was pretty cool to be able to make the CPU execute a single instruction in the middle of nowhere. Pointless, but cool. :) -Justin
